repl: fix eval errors thrown after close throwing ERR_USE_AFTER_CLOSE

prevent incorrect throws of `ERR_USE_AFTER_CLOSE` errors when the eval
function of a repl server returns an error after the repl server
has been closed

PR-URL: #58791
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: dario-piotrowicz

lib/repl.js

@@ -748,7 +748,9 @@ function REPLServer(prompt,
         process.emit('uncaughtException', e);
         self.clearBufferedCommand();
         self.lines.level = [];
-        self.displayPrompt();
+        if (!self.closed) {
+          self.displayPrompt();
+        }
       });
     } else {
       if (errStack === '') {
@@ -778,7 +780,9 @@ function REPLServer(prompt,
       self.output.write(errStack);
       self.clearBufferedCommand();
       self.lines.level = [];
-      self.displayPrompt();
+      if (!self.closed) {
+        self.displayPrompt();
+      }
     }
   });
 

test/parallel/test-repl-eval-error-after-close.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const common = require('../common');
+const repl = require('node:repl');
+const stream = require('node:stream');
+const assert = require('node:assert');
+
+// This test checks that an eval function returning an error in its callback
+// after the repl server has been closed doesn't cause an ERR_USE_AFTER_CLOSE
+// error to be thrown (reference: https://github.com/nodejs/node/issues/58784)
+
+(async () => {
+  const close$ = Promise.withResolvers();
+  const eval$ = Promise.withResolvers();
+
+  const input = new stream.PassThrough();
+  const output = new stream.PassThrough();
+
+  const replServer = repl.start({
+    input,
+    output,
+    eval(_cmd, _context, _file, cb) {
+      close$.promise.then(() => {
+        cb(new Error('Error returned from the eval callback'));
+        eval$.resolve();
+      });
+    },
+  });
+
+  let outputStr = '';
+  output.on('data', (data) => {
+    outputStr += data;
+  });
+
+  input.write('\n');
+
+  replServer.close();
+  close$.resolve();
+
+  process.on('uncaughtException', common.mustNotCall());
+
+  await eval$.promise;
+
+  assert.match(outputStr, /Uncaught Error: Error returned from the eval callback/);
+})().then(common.mustCall());